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1. 发明申请

WO1991017204A1 POLYVINYLIDENE FLUORIDE MEMBRANE 审中-公开
标题翻译：聚乙烯氟化物膜
公开(公告)号：WO1991017204A1
公开(公告)日：1991-11-14
申请号：PCT/AU1991000198
申请日：1991-05-09
申请人： MEMTEC LIMITED , BECK, Thomas, William , LEE, Matthew, Brian , GRANT, Richard, David , STREETON, Robert, John, William
发明人： MEMTEC LIMITED
IPC分类号： C08J09/28
CPC分类号： C08J9/28 , B01D67/0011 , B01D67/0018 , B01D67/0027 , B01D67/003 , B01D69/02 , B01D69/08 , B01D71/34 , B01D2323/08 , B01D2323/12 , C08J2327/16
摘要： A method of making a porous polymeric material by heating a mixture comprising polyvinylidene fluoride and a solvent system initially comprising a first component that is a latent solvent for polyvinylidene fluoride and a second component that is a non-solvent for polyvinylidene fluoride wherein, at elevated temperature, polyvinylidene fluoride dissolves in the solven system to provide an optically clear solution. The solution is then rapidly cooled so that non-equilibrium liquid-liquid phase separation takes place to form a continuous polymer rich phase and a continuous polymer lean phase with the two phases being intermingled in the form of bicontinuous matrix of large interfacial area, and cooling is continued until the polymer rich phase solidifies. The polymer lean phase is removed from the solid polymeric material. A porous material so prepared is characterised by a lacey or filamentous structure consisting of a plurality of polymer strands (1) connected together at a number of locations (2) spaced apart along each strand.
摘要翻译：一种通过加热包含聚偏二氟乙烯和溶剂系统的混合物制备多孔聚合材料的方法，该溶剂体系最初包含作为聚偏二氟乙烯的潜溶剂的第一组分和作为聚偏氟乙烯的非溶剂的第二组分，其中在高温下，聚偏二氟乙烯溶解在溶剂系统中以提供光学透明的溶液。然后将溶液快速冷却，使得发生非平衡液 - 液相分离以形成连续聚合物富相和连续的聚合物贫相，其中两相以大界面积的双连续基体的形式混合，并且冷却继续进行，直到聚合物富集相凝固。从固体聚合物材料中除去聚合物贫相。如此制备的多孔材料的特征在于由沿着每条链间隔开的多个位置（2）连接在一起的多个聚合物股线（1）组成的花边或丝状结构。

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